i am a regular qwertee buyer, and thats exactly what i was comparing mine to.
i felt i would wear about 7 of them happily, there was one i gave away as i wouldn't wear it, and two i wasn't mad about.
But queteee's are very clever and sometime subtle. The iwoot/zavvi's are not. They are straight up robocop written under a picture of robocop type tees. It not 'bad' but i've often been stopped by strangers or in a shop admining my quertees, and i dont think that would happen in a thousand years with the iwoot.
10 tees for 33 euro isnt to be sneezed at, but they would not be your favourite tees ... in my opinion.